I give up!
I ordered some other YOU shoes sz. 6 1/2 and the fit small on me so I took a chance and ordered these in the same sz. they fit big, the straps are too loose and my foot is not narrow let me add. I really wanted to keep them but will be returning. If you feed your feet a strict diet of fastfood for a month they should fit. On a side note, they are cute, well made and comfortable.